The key to restoring climate stability is shifting from a fossil fuel based energy economy to one based on renewable sources of energy and hydrogen. Advancing technologies in the design of wind turbines that have dramatically lowered the cost of wind generated electricity to the point where it can be used to produce hydrogen from water, along with the evolution of fuel cell engines, have set the stage for a dramatic restructuring of the world energy economy. The good news is that this shift is under way. The bad news is that it is not happening nearly fast enough to avoid a climate disrupting buildup in atmospheric carbon dioxide levels, writes Lester Brown of the Earth Policy Institute.